Flush with salary-cap space after trading Percy Harvin trade and releasing cornerback Antoine Winfield, Minnesota Vikings general manager Rick Spielman spent the first day of free agency locking up his own players.

Who made the best move at the dawn of free agency? Our analysts debate, and Miami earns praise for inking
Mike Wallace.
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NFL.com's Albert Breer reported Tuesday the Vikings have agreed in principle with Henderson on a two-year contract. Starting 10 of 14 games last season, Henderson racked up a career-high 80 tackles to go with three sacks as the weakside linebacker.

A 28-game starter the past two years, Sanford got the word out via Twitter that he was "coming home" to the Vikings. According to ProFootballTalk.com, it's on a two-year contract. A weak spot in the Vikings' secondary two years ago, Sanford showed a nose for the ball while playing alongside rangy rookie Harrison Smith last season.

Berger is a journeyman who's back on the interior of the offensive line.